Input Method + Screen on Delay

[I_like_coding]

Hello guys,
I am new to this forum. Recently I have been having some problems with my phone (Xperia M).

1. I cannot change the default input method to any other keyboard in any other way without the device rebooting. Dunno why at all. (Note, I suspect it is because I forgot to remove the Input Method for "GO Keyboard" before uninstalling the app.)

2. When I switch the screen off by tapping the power button, it doesn't switch back on for a few seconds. (Note, I have the lock timer on 5 seconds)

My phone is on stock 4.3, full root access, BusyBox installed, Xposed Framework (NO keyboard or lockscreen mods) and it is aporoximately 1.5 years old.

[Phy]

Try repairing the phone with Sony PC Companion.
http://support.sonymobile.com/us/tools/pc-companion/

[Phy]

You can also check if you experience the same while on safe mode.

How to boot on safe mode.
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008